i solo frequently and have done the deluxe... In fact i'll be doing it again next month.
As others have pointed out, it depends on how you eat and what kind of trip you have planned... I'm not a "parks commando" person but more a "stop and smell the roses' type... I run enough in rl

taking it easy and enjoying nice meals is one way to treat myself on vacation... Generally i will have 2 meals a day with a signature in the evening... Depending on where i'm staying i might order room service...
Some people don't like to eat solo in a restaurant but i have to say i love all the special attention i get from wait staff at disney

They always go out of their way to make the meal special
btw, for me it's either the deluxe or no meal plan... I find that i really am not a cs person... Not into eating off a tray... I like to be waited on!
edited to add: Capt jacks isn't what it used to be... I wouldn't waste a credit there. Ymmv